ac-20-2-portable-storage-devices-restricted-use

name	AC-20(2)_portable-storage-devices-restricted-use
description	Restrict the use of organization-controlled portable storage devices by authorized individuals on external systems using [organization-defined].
category	authorization
version	5.2.0
author	cyberstrike-official
tags	["nist","sp800-53","rev5","ac-20-2","ac","enhancement"]
tech_stack	["aws","azure","gcp","linux","windows"]
cwe_ids	["CWE-284"]
chains_with	["MP-7","SC-41"]
prerequisites	["AC-20"]
severity_boost	{"MP-7":"Chain with MP-7 for comprehensive security coverage","SC-41":"Chain with SC-41 for comprehensive security coverage"}

AC-20(2) Portable Storage Devices — Restricted Use

Enhancement of: AC-20

High-Level Description

Family: Access Control (AC) Framework: NIST SP 800-53 Rev 5

Limits on the use of organization-controlled portable storage devices in external systems include restrictions on how the devices may be used and under what conditions the devices may be used.

What to Check

• Verify AC-20(2) Portable Storage Devices — Restricted Use is documented in SSP
• Confirm control is operating effectively
• Review evidence of continuous monitoring for AC-20(2)
• Verify enhancement builds upon base control AC-20

How to Test

Step 1: Review Documentation

Examine the System Security Plan (SSP) and related artifacts for AC-20(2) implementation details. Verify the organization has documented how this control is satisfied.

Step 2: Validate Implementation

# For cloud environments, use cloud-audit-mcp tools
# For on-premises, review system configurations directly

# Example: Check if account management policies exist
grep -r "account.management\|access.control" /etc/security/ 2>/dev/null

Step 3: Test Operating Effectiveness

Verify the control is actively functioning, not just documented. Check logs, configurations, and operational evidence.

Tools

Tool	Purpose	Usage
cloud-audit-mcp	Check IAM policies and access controls	cloud_audit_iam_policies
hackbrowser-mcp	Test web application access controls	browser_auth_test

Remediation Guide

Control Statement

Restrict the use of organization-controlled portable storage devices by authorized individuals on external systems using [organization-defined].

Implementation Guidance

Limits on the use of organization-controlled portable storage devices in external systems include restrictions on how the devices may be used and under what conditions the devices may be used.

Risk Assessment